Masayuki Katakura
51Patents
9h-index
45Co-inventors
78Inventor score
Filing activity: Oct 7, 1976 → Apr 27, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6005445A | Phase adjustment circuit including a ring oscillator in a phase locked loop | Electricity | 25 | Expired |
| US4288707A | Electrically variable impedance circuit | Electricity | 19 | Expired |
| US6597650B2 | Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compenstation circuit and recording and/or playback apparatus employing the same | Physics | 17 | Expired |
| US6075413A | Amplifier circuit and control signal generator | Electricity | 16 | Expired |
| US4516081A | Voltage controlled variable gain circuit | Electricity | 13 | Expired |
| US6160534A | Liquid crystal display drive circuit and liquid crystal display | Physics | 13 | Expired |
| US4547741A | Noise reduction circuit with a main signal path and auxiliary signal path having a high pass filter characteristic | Electricity | 11 | Expired |
| US4804904A | Voltage to current converters for use in an active filter and with a moise reduction circuit | Electricity | 10 | Expired |
| US4422049A | Gain control circuit | Electricity | 9 | Expired |
| US4422051A | Gain control circuit | Electricity | 9 | Expired |
| US4462008A | Noise reduction circuit having voltage to current converting means in the auxiliary channel | Electricity | 9 | Expired |
| US6081166A | Voltage controlled oscillator including a plurality of buffer circuits diodes, current sources, MIS capacitors | Electricity | 9 | Expired |
| US4109165A | RMS circuit | Electricity | 8 | Expired |
| US7123175B2 | Angle detection apparatus computing phase differences between first and second phase angles | Electricity | 8 | Expired |
| US4739304A | Digital-to-analog converting system | Electricity | 8 | Expired |
| US4453091A | Level detecting circuit | Electricity | 8 | Expired |
| US5446409A | Cross coupled symmetrical current source unit | Electricity | 7 | Expired |
| US6154192A | Liquid crystal display device and data line drive circuit of liquid crystal display device | Physics | 6 | Expired |
| US4427950A | Noise reduction circuit | Electricity | 6 | Expired |
| US6104626A | Analog value memory circuit | Physics | 6 | Expired |
| US4441083A | Noise reduction circuit | Electricity | 5 | Expired |
| US4521738A | Gain control circuit | Electricity | 5 | Expired |
| US4498053A | Current amplifier | Electricity | 5 | Expired |
| US4203043A | Tristate changeover switching circuit | Electricity | 4 | Expired |
| US4441084A | Noise reduction circuit | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.